Arm assembly and unmanned aerial vehicle thereof

Abstract

Embodiments of the present disclosure relate to an arm assembly and an unmanned aerial vehicle thereof. The arm assembly includes: an arm support; an arm, where the arm is movably connected to the arm support, and is rotatable in a first direction and an opposite second direction; a locking member, where the locking member is disposed in the arm support, and is capable of abutting against or separating from the arm; and a connecting rod, where the connecting rod is connected between the locking member and the arm support, to associate rotation of the connecting rod with reciprocation of the locking member, when the locking member abuts against the arm, rotation of the arm in the first direction is capable of being restricted; and the locking member is separable from the arm driven by the rotation of the connecting rod, to release the restriction on the rotation of the arm.

What is claimed is: 
     
         1 . An unmanned aerial vehicle, comprising:
 a vehicle body; and   a plurality of arm assemblies;   wherein arm supports of the arm assembly are fixed on the vehicle body; and   each of the plurality of arm assemblies includes:
 an arm support, 
 an arm, wherein the arm is movably connected to the arm support, and is rotatable in a first direction and an opposite second direction, 
 a locking member, wherein the locking member is disposed in the arm support, and is reciprocates to abut against or separate from the arm, and 
 a connecting rod, wherein the connecting rod is connected between the locking member and the arm support and associates rotation of the connecting rod with reciprocation of the locking member, wherein the connecting rod has a first tail end and a second tail end that are away from each other, the first tail end of the connecting rod being movably connected to the arm support and the second tail end of the connecting rod extending outside the arm support and exposed for unobstructed access and engagement by a user; and 
   wherein
 when the locking member abuts against the arm, rotation of the arm in the first direction is restricted, and
 when the connecting rod is actuated and rotated by a user pushing on the exposed second tail end of the connecting rod, the locking member is driven by the rotation of the connecting rod, 
 separates from the arm, and 
 releases the restriction on the rotation of the arm. 
 
   
     
     
         2 . The unmanned aerial vehicle according to  claim 1 , wherein the arm assembly has a folded state and an unfolded state,
 wherein when the arm assembly is switched from the unfolded state to the folded state, a rotation direction of the arm relative to the arm support is the first direction; and   when the arm assembly is switched from the folded state to the unfolded state, the rotation direction of the arm relative to the arm support is the second direction.   
     
     
         3 . The unmanned aerial vehicle according to  claim 2 , wherein a chute is provided in the arm support, the locking member comprising:
 a slider, wherein the slider is accommodated in the chute, and is reciprocate in an extension direction of the chute; and   an elastic member, wherein the elastic member is connected between the slider and the arm support, and is configured to apply an elastic force,   wherein the elastic force is a force driving the slider to abut against the arm.   
     
     
         4 . The unmanned aerial vehicle according to  claim 3 , wherein an end of the chute away from the arm is a closed end, the elastic member being a compression spring,
 wherein one end of the compression spring abuts against the closed end of the chute and the other end of the compression spring abuts against the slider and is configured to apply the elastic force to the slider.   
     
     
         5 . The unmanned aerial vehicle according to  claim 3 , wherein an end of the chute close to the arm is an open end, to expose at least part of the slider from the chute, a first concave portion being disposed on the arm,
 when the arm assembly is in the unfolded state, at least part of the exposed part of the slider is accommodated in the first concave portion.   
     
     
         6 . The unmanned aerial vehicle according to  claim 5 , wherein a second concave portion is further disposed at the arm, the second concave portion and the first concave portion being disposed in a rotational circumferential direction of the arm,
 when the arm assembly is in the folded state, at least part of the exposed part of the slider is accommodated in the second concave portion.   
     
     
         7 . The unmanned aerial vehicle according to  claim 6 , wherein the first concave portion has a first contact surface and a second contact surface that are at a preset angle and the second concave portion has a third contact surface and a fourth contact surface that are at a preset angle,
 when the arm assembly is in the unfolded state, an angle between the second contact surface and the elastic force is within a preset first angle range, to enable the slider to remain abutting against the arm; and   when the arm assembly is in the folded state, an angle between the third contact surface and the elastic force is within a preset second angle range, to enable the slider to overcome the elastic force and separate from the arm along with rotation of the arm in the second direction.   
     
     
         8 . The unmanned aerial vehicle according to  claim 3 , wherein the connecting rod comprises:
 a holding portion, wherein the holding portion is located at the second tail end of the connecting rod,   wherein the slider is movably connected to the connecting rod, to associate reciprocation of the slider with rotation of the holding portion.   
     
     
         9 . The unmanned aerial vehicle according to  claim 2 , wherein the arm support further comprises a limiting portion, the limiting portion being disposed on a movement trajectory of the arm,
 wherein when the arm assembly is in the unfolded state, the limiting portion abuts against the arm, to restrict rotation of the arm in the second direction.